Not necessarily that, but mounting locations inside the trunk. When I test fitted the CD5 strut (measures 7.5" closed, 13.5" fully extended), I attached one end to the hinge, but I couldn't find a place inside the trunk to mount the strut that would allow it to pivot enough with the hinge when closed, which obviously means the strut I'm trying to use is too short for what I want it to do.

And yes, the hinge design is really stupid, not to mention the hinges do take up a lot of space when closed, since they hang right down into the usable space.